unofficial
Britishadjective
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not official or formal
an unofficial engagement
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not confirmed officially
an unofficial report
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(of a strike) not approved by the strikers' trade union
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(of a medicinal drug) not listed in a pharmacopoeia
Other Word Forms
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It was the last performance of his tour and the unofficial kickoff of a new Hollywood adventure.
From Los Angeles Times ● Oct. 15, 2026
In 2019 he became the first person to break the two-hour marathon barrier under special conditions in Vienna, clocking an unofficial time of one hour 59 minutes 40 seconds.
From BBC ● Oct. 11, 2026
It is an unofficial downtown landmark that was considered chic when it opened as an indoor mall in the 1970s.
From Los Angeles Times ● Oct. 7, 2026
In fact, as his unofficial biographer Michael Crick later discovered, Archer's alma mater in the States was, in fact, a bodybuilding club.
From BBC ● Oct. 5, 2026
She’s dressed in jeans, a gray hoodie, and Sperry’s, the unofficial uniform of Poplar Springs Middle School students.
From "A Place at the Table" by Saadia Faruqi and Laura Shovan
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
